allen



Patented Oct. ll, I898.

C. B. ALLEN. ROTARY BAMMER FOR PIPE FLASKS.

(Application filed Sept. 17, 1897.)

2 Sheets-Sheet I.

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Patented Oct. ll, I898.

No. 6l2,300.

G. B. ALLEN.

ROTARY HAMMER FOR PIPE FLASKS.

(Application filed Sept. 17, 1897.)

2 Sheets-Sheet 2.

(No Model.)

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m: norm: virus so, woroumou WASHINGTON nv c UNITED STATES FFICE.

PATENT CHARLES B. ALLEN, OF BURLINGTON, NEW JERSEY, ASSIGNOR TO ANDREWH. MONEAL, OF SAME PLACE.

ROTARY RAMMER FOR PlPE-FLASKS.

SPECIFICATION forming part of Letters Patent No. 612,800, dated October1 1, 1898.

Application filed September 17, 1897. ,Serial No. 651,991. (No model.)

T0 at whom it may concern.-

Be it known that I, CHARLES E. ALLEN, a citizen of the United States,and a resident of Burlington, Burlington county, New Jersey, haveinvented certain Improvements in R0- tary Rammers for Pipe-Flasks, ofwhich the following is a specification.

My invention relates to the art of making sand molds for casting'pipeand other cylindrical shapes; and it consists of certain improvements inmachines for packing the sand against the walls of the pipe-flaskspreparatory to placing the cores in the same.

My invention is fully illustrated in the accompanying drawings, in whichFigure 1 is a side elevation of my improved machine. Fig. 2 is a frontelevation of the same. Fig. 3 is a plan view, and Figs. 4 and 5 areviews of details of my invention.

The ordinary method of forming sand molds for casting small pipe is wellknown in the art and is substantially as follows: A packing or rammingpattern-bar carried by the jib of a crane or other suitable structure isarranged in such a manner that it may be lowered into the flask locatedin the molding-pit. This packing or ramming bar is usually provided withsome means for packing the sand against the wall of the flask. After thepattern-bar has been lowered in the flask sand is poured into the same.The bar is then rotated and slowly withdrawn from the flask, packing thesand against the wall of the flask as it moves upward. Heretofore,however, it has been found impracticable to pack more than one flask ata time, and it has been practically impossible to pack flasks for pipesof small diameter.

This present invention therefore consists of a machine having rotatingramming or packing pattern-bars adapted to pack two or over which thechain 13, supporting the pattern-bars, passes. This chain is attached atone end to a hook 17 secured to the end of the jib, passes over one ofthe sheaves d thence over the sheave b, then over the other sheave (1and thence over the sheaves b and b to the drum A, to which it isfastened.

The pattern-bars are shown at O, and they are carried by a head D,having a projection d, adapted to engage and slide up and down on a ribor flange A on the side of the crane, a guide D for the pattern-bars 0being arranged near the bottom of the crane. The pattern-bars are hollowand are provided with a series of ribs 0, secured to the surface of thesame in any suitable manner. The head D carries flanged dependingportions (1, to which the patternbars 0 are secured by means of suitablebolts 0. ThisheadD drops by gravity when the pattern-bars are introducedinto the flasks C; but it is lifted when the flasks are being packed bythe rotating pattern-bars by means of the chain B, which passes over thesheaves d carried by a suitable frame d mounted on top of the head D. Asquare shaft E is carried by a bevel-wheel e, j ournaled in the jib B.This shaft E passes through the head D, the lower end of the sameresting in a step-bearing g in the guide D, and is driven by means ofthe bevel gear-wheel eat the top of the jib. Each of theflangeddepending portions (1, "which carry the pattern-bars O, has a pinion cat the top of the same suitably journaled in the head D, and meshingwith these pinions c is a pinion e, through which the square shaft Epasses. This pinion e is the driving-pinion for the pattern-bars and iscarried up and down by the head D to transmit motion to the pinions cand thus rotate the pattern-bars C. In order to carry the driving-pinione, a split collar 01 is arranged on the head D, and this collar engagesthe lower portion 0 of this 5 pinion and forms a bearing for the same,as shown in Fig. 5, a suitable bolt or set-screw (1 being provided forholding the collar together. The bevel-wheel e, carrying the shaft E, isdriven by the pinion f on the counter- 10o shaft F, which in turnreceives motion from the driving-shaft Gr through the medium of thebevel-pinions f and g.

Mounted at the back of the crane is the winding-drum A, adapted to asuitable frame H and provided with suitable clutching mechanism J,whereby it may be connected to or released from operative engagementwith the gear-wheel H. This gear-wheel H is driven by a pinion h,mounted on a counter-shaft G inside the crane, which receives its motionfrom the driving-shaft G through the medium of the bevel-pinions g and gand is in turn driven by the shaft G (Shown in dotted lines.) Thedriving-shaft is journaled in a suitable bearing 9 fixed to the crane.The winding-drum is provided for the purpose of raising the pattern-barsout of the flasks as they pack the sand against the walls of the same.

The driving-shaft G is constantly in motion and the gear-Wheel H isrevolving all the time. The rammers are also constantly rotating bothwhen they are dropped into the flask and when they are lifted out of thesame, and to lift them out of the flasks the winding-drum must beclutched to the gearwheel H. A suitable pawl or other device may bearranged on the winding-drum, so that it will be held against backwardmovement during the operation of raising the pat- While the presentapparatus is shown and has been designed especially for the purpose oframming or packing two pipe-flasks at one operation, it will be quiteevident thatwith but slight modification it may be constructed to ramthree or more flasks, as occasion may demand or circumstances require.

Having thus described my invention, I claim and-desire to secure byLetters Patent 1. The combination in a machine of the characterdescribed, of the crane, a vertical slideway on the same, a head adaptedto said slideway, depending members carried by said head, pattern-barsconnected to said members, pinions journaled in the head and carried atthe top of said depending members, a driving-pinion journaled in thehead and operatively connected thereto and means for driving said pinionwhereby the pattern-bars may be rotated.

2. The combination in a machine of the character described, of thecrane, a vertical slideway on the same, a head adapted to said slideway,depending members carrying pattern-bars secured to said head, pinions onsaid members, a driving-pinion meshing with tern-bars from the flasks.

The crane is adapted to revolve so as to pack different sets of flasksin the pit; but as it is necessary that it be in position to permit thepattern bars to register with the flasks I provide a lever K, pivoted atat the base of the crane and carrying a stud k, adapted to engagedepressions k in the baseplate A secured to the floor of the shop, thelever also serving to turn the crane when it is to be moved. Ifnecessary, any suitable device may be used to lock this lever when thepacking operation is going on.

The operation of the machine is as follows: The flasks 0 being fixed inthe pit directly underneath the pattern-bars 0, so that said bars mayenter the flasks directly in the center of the same, the winding-drum isreleased and the head D, supporting the pattern-bars O, descends,carrying said bars to the bot-tom of the flasks, and sand is then pouredinto the flasks in the space between the walls of the same and thepattern-bars. When a sufficient quantity ofv sand has been placed in theflasks, the winding-drum is clutched to the driving mechanism and thepattern-bars, revolving all the time, are slowly lifted out of theflasks, the ribs on the surface of the same packing the sand against thewalls of the flask. When one pair of flasks have been packed, the craneis moved so as to bring the pattern-bars over the next pair of flasks,the said flasks being arranged in the pit in series of two, as shown inFig. 3. The finished molds are then lifted out of the pit and fresh onesplaced therein, the packing or ramming operation continuing as before.

the same and carried by the head,and a square shaft upon which saiddriving-pinion is adapted to slide j ournaled in suitablebearings,serving to turn said driving-pinion.

3. The combination in a machine of the character described, of thecrane, the jib mounted on the same, a Vertical slideway on the crane, ahead carrying rotating patternbars adapted to said slideway, means forrotating said bars consisting of pinions operatively connected to thesame and a drivingpinion meshing therewith, and a square shaft forturning said driving pinion passing through the same and having at itsupper end a pinion journaled in the jib which serves to drive saidsquare shaft.

4. The combination in a machine of the character described, of thecrane, a vertical slideway on the same, a head adapted to said slideway,depending members carried by said head, pattern-bars connected to saidhead, pinions journaled on the head and carried at the top of saiddepending members, a drivingpinion operatively connected thereto, meansfor driving said pinion whereby the patternbars may be rotated, and asplit collar carried by the head and serving to hold the driving-pinionthereto and also as a bearing for said pinion, substantially asdescribed.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

CHAS. B. ALLEN.

Witnesses:

MURRAY 0. BOYER, J os. H. KLEIN.

